I'm operating off of Mac 10.5.6. I've tried loading the Font Suitcase file for "A Helvetica Neue" with Font Book and Linotype Font Explorer X but it will not take it. Apparently "Helvetica Neue" is a system font, so I thought that might be a problem. I went through the process of digging it out of the "protected fonts" folder, deep in the recesses of the mac, and after getting rid of any trace of it. It still would not accept the Font Suitcase. Any ideas?